Cisco Email Security Appliance (ESA) – is solution that allows you to provide full control of email and protect corporate users from attacks distributed through electronic communications.

Standard connection scheme for Cisco ESA in the local network are as follows:

ESA acts as an email security gateway that provides the following functions:

Checks the reputation of the sender-lets you check real-time sender reputation using SBRS (Sender Base Reputation Score). Letters from potentially harmful senders can be blocked or subjected to additional scrutiny. Using this function over 80% of unwanted letters are eliminated. Only title of the message is checked, it helps to reduce the load on the Internet access channel.

Antispam-produces a context analysis, which examines content of a message, build order, availability and check Web links in a message (using the SBRS). Verified spam letter is blocked or delivered to the user with the appropriate prefix.

Outbreak filters – help to protect from zero-day attacks, due possibility of Cisco Talos analysis of more than 25% of the world’s Internet traffic. This analysis allows you to scan email traffic anomalies (e.g., mass mailing of messages with suspicious content or attachments) and automatically create and send to ESA rules that redirect abnormal messages to quarantine.